Lock



FIG. 1 is a top, front, right side perspective view of a lock showing a first embodiment of our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a bottom, front, left side perspective view thereof.

The broken lines illustrate portions of the lock that form no part of the claimed design. All other broken lines illustrate portions of the lock that form no part of the claimed design. 

CLAIM The ornamental design for a lock, as shown and described. 